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btrfs-progs: device: add replace subcommand as alias to 1st level command

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The command group of 'replace' belongs to device and could be seen as
confusing. At minimum we can add an alias so now there's equivalent:

  # btrfs replace start
  # btrfs device replace start

Both commands will exist for backward compatibility, tough we might
revisit which one is the primary one.

Issue: #484
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2022-07-18 19:26:39 +02:00
parent 99ce788a0d
commit cef73a5e98
2 changed files with 21 additions and 0 deletions
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3
Documentation/btrfs-device.rst
View File

@ -74,6 +74,9 @@ remove [options] <device>|<devid> [<device>|<devid>...] <path>
delete <device>|<devid> [<device>|<devid>...] <path>
Alias of remove kept for backward compatibility
replace <command> [options] <path>
Alias of whole command group *btrfs replace* for convenience. See ``btrfs-replace(8)``.
ready <device>
Wait until all devices of a multiple-device filesystem are scanned and
registered within the kernel module. This is to provide a way for automatic

18
cmds/device.c
View File

@ -920,6 +920,23 @@ static int cmd_device_usage(const struct cmd_struct *cmd, int argc, char **argv)
}
static DEFINE_SIMPLE_COMMAND(device_usage, "usage");
static const char * const cmd_device_replace_usage[] = {
"btrfs device replace <command> [...]\n"
"\tReplace a device (alias of \"btrfs replace\")",
"Please see \"btrfs replace --help\" for more information.",
NULL
};
static int cmd_device_replace(const struct cmd_struct *unused,
int argc, char **argv)
{
return cmd_execute(&cmd_struct_replace, argc, argv);
}
/* Alias of 1st level command 'replace' as a subcommand of 'device' */
static DEFINE_COMMAND(device_replace, "replace", cmd_device_replace,
cmd_device_replace_usage, NULL, CMD_ALIAS);
static const char device_cmd_group_info[] =
"manage and query devices in the filesystem";
@ -928,6 +945,7 @@ static const struct cmd_group device_cmd_group = {
&cmd_struct_device_add,
&cmd_struct_device_delete,
&cmd_struct_device_remove,
&cmd_struct_device_replace,
&cmd_struct_device_scan,
&cmd_struct_device_ready,
&cmd_struct_device_stats,